[An experimental study on the effects of immobilization and age on gastric ulceration].
D000367:Age Factors; D000818:Animals; D002908:Chronic Disease; D006801:Humans; D007103:Immobilization; D011187:Posture; D011602:Psychophysiologic Disorders / Q000209:etiology; D051381:Rats; D013276:Stomach Ulcer / Q000209:etiology*; D013312:Stress, Physiological